Prototype Emscripten Bindings

[ihedvall]

No description provided.

[ihedvall]

@sachitv
How is it going with the prototype?

[sachitv]

Hi @ihedvall I had a prototype branch up and running. I had tried reading a few mf4 files but the performance was pretty slow. I haven't had the time to root cause though.

[ihedvall]

@sachitv
For Your Information.
I'm changing the standard C (FILE*) interface to a std::streambuf interface. It is now possible to use non-file stream interfaces. I don't know if this solves (or causing) some problems within an Emscripten MDF4 interface. The change is made so the library can be used in the cloud against non-file interfaces.

[sachitv]

That's a good idea. I noticed that being a slowdown in another project as the WORKERFS seems to run very slowly with the file interface. The repeated overhead of calling slice() on blobs seems to cause bottlenecks.

The fix highlighed here seemed to alleviate this issue in that other project.
emscripten-core/emscripten#6955